© The Institution of Electrical Engineers
The application of bias current feedback to a semiconductor optical amplifier is shown to improve considerably its noise and distortion performance in analogue applications. Improvements in harmonic distortion of up to 12.75 dB, and in noise levels of up to 7.5 dB, have been achieved.
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Constable, J.A., White, I.H., Coles, A.N., Cunningham, D.G.: `Enhancement of the harmonic performance of a semiconductor optical amplifier using bias current feedback', Proc. SPIE, 1993, p. 363–371.
http://iet.metastore.ingenta.com/content/journals/10.1049/el_19931364
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